fbpx
Farmers Almanac
The Farmers Almanac
Order your copy today!

Mosquito-Repelling Plants: Fact or Fiction?

Share on Facebook Share on Twitter Share on Pinterest Share on LinkedIn Subscribe by Email Print This Post
Mosquito-Repelling Plants: Fact or Fiction?

Summer means bloodthirsty mosquitos will soon be ruining our backyard festivities and outdoor adventures. More and more people are turning to natural botanicals to repel pests rather than toxic chemical sprays like DEET. Fragrant, leafy mosquito-repelling plants are popping up in garden centers everywhere across the country and people are buying them up in an effort to create bug-free back yards. But are the claims true? Do these plants work at repelling mosquitos? There’s good news and bad news.

Mosquito Plant

Mosquito Plant (citrosa geraniums or Pelargonium citrosum) is an attractive tropical plant with lacy green foliage and beautiful flowers and a member of the geranium family. It is prized for its citrus aroma that comes from the oils in the foliage. But simply placing a Mosquito Plant on your patio won’t stop mosquitoes from biting. In fact, according to the American Botanical Council, while these plants have been engineered to produce citronella oil, they only contain trace amounts—not enough for any real lasting pest control. They’re certainly beautiful plants to grow in the back yard, but if you’re planting them because of the promise of fewer bugs flying around your yard, you might want to reconsider.

The Mosquito Plant – Garden centers claim they repel mosquitos. But do they work?

Lemongrass

Lemongrass (Cymbopogon), a tall grassy tropical plant that’s considered to be the “real” source of citronella (used in bug-repelling candles and sprays, as well as in cleaning products), won’t repel mosquitos sitting in your flower beds or in a pot. Again, the leaves must be crushed to release the mosquito-repelling oils.

Fortunately, it’s not all doom and gloom. If you happened to purchase one of these plants in hopes of getting some bug repelling benefits, studies do show that the oils from the crushed leaves of these plants are somewhat effective at repelling mosquitos, even if at only a fraction of effectiveness of DEET. But they’re not very long-lasting and only last about 30 minutes.

Unsung Heroes

Two other plants that don’t get nearly the amount of repellent recognition and actually work better than Mosquito Plant and citronella are as follows:

  • Lemon Thyme or “Creeping Lemon Thyme” (Thymus X citriodorus), a perennial, seemed to do better than either lemongrass or Mosquito Plant at repelling mosquitos, studies show.
  • Lemon Balm (Melissa officinalis) contains more citronella—as much as 400 times more—than the Mosquito Plant. And it turns out both lemon thyme and lemon balm are less expensive and easier to grow.

These leaves of both these plants also need to be crushed to release the oils.

Lemon Balm contains more citronella oil than the Mosquito Plant and is easier to grow.

DIY Methods

If you want to test the mosquito-repelling properties of any of the plants mentioned above, simply crush the leaves and rub the oils directly onto your bare arms and legs (but test a small area of your skin first to check for sensitivity). Reapply as needed.

Or try this DIY spray repellent: Harvest and crush the plant ‘s leaves and soak it in three parts vodka per one part of plant material. Bottle it up and let it sit out of direct sunlight for a few weeks before using. Spray on the skin (test a small area first) before heading outdoors.

Are They Safe for Pets?

The ASPCA warns that all members of the geranium family, Pelargonium, are unsafe for pets. They contain the active toxins geraniol and linalool. Contact with the Mosquito Plant can cause skin irritation, so don’t rub the leaves of this plant on Rover. Ingestion can cause diarrhea and other unpleasant side effects. Keep the Mosquito Plant and other geraniums away from your pets.

Lemongrass has a catnip-like effect on most cats but should not be ingested by cats or dogs. We recommend you check with your vet.

With contributions from freelance writer, Deborah Tukua

Garden Hair Don't Care Hat


Price: $19.99

Oh, snap! Didn't have time to do your hair? Who cares! You've got more important things to do, like grow your own food. Find your inner peas with our 100% cotton twill distressed hat that lets everyone know where your priorities lie. Embroidered right here on the premises. A great a gift for your gardening gal pals-they're sure to dig it!

Shop Now »

5 comments

1 Susan Higgins { 05.10.19 at 9:25 am }

Hi David, we do have a post about chrysanthemums and their bug repelling powers here: https://www.farmersalmanac.com/what-to-plant-to-keep-bugs-away-24734
The mosquito-repelling plants we limited to those with the “citronella” component. But thanks for the information.

2 David { 05.09.19 at 7:28 am }

I have a Question.. Why isn’t Chrysanthemum on the List? Its what the ACTUAL State used Mosquito spray is. SC Johnson Lice spray, is practically the same thing from a mosquito truck in my neighborhood. I was mad to see a truck, spraying something like that, only to find its artificial chrysanthemum spray. Its only dangerous to Cats and Water. Like Really bad to put in the drain, and a cat cant process the enzyme. Similar to how a Dog cant process Xylitol . I would suggest buying pure chrysanthemum oil, then spritzing around all the doors, and planting chrysanthemums around the house. Lice Flea and Tic.. ALL Dont Like. Fairly Cheap. A Hunter could spray their pants and shoes.. less tics. You could spray your dogs collar while not on them. Its known safer to humans than nail polish remover. yikes.

3 Brent Bielema { 05.08.19 at 8:20 pm }

Catmint or catnip would also be a good choice since the oil has remarkable insect repellent properties, according to scientific studies. Plus it makes a dandy blue flowered perennial with a bonus: countless visiting cats. They love the fragrance since it reminds them of their own..well, you get the picture!!

4 Sally Smith { 05.08.19 at 3:53 pm }

We plant mint by our pond and on our deck in planters and never have a problem with mosquitoes. We have done this for about 10 years now. Seems to work for us.

5 Ashley { 05.08.19 at 7:12 am }

I personally have tried several mosquito and bug repellent plants and I can attest to their effectiveness. The best plant I have found for mosquitoes and other bugs is basil. I plant basil by my front door and very rarely see a mosquito. I used to be bombarded with them. Other lesser effective plants are lemon balm, lavender and rosemary.

Leave a Comment

Note: Comments that further the discussion of the above content are likely to be approved. Those comments that are vague or are simply submitted in order to promote a product, service or web site, although not necessarily considered "spam," are generally not approved.

If you notice a hole in the upper left-hand corner of your Farmers' Almanac, don't return it to the store! That hole isn't a defect; it's a part of history. Starting with the first edition of the Farmers' Almanac in 1818, readers used to nail holes into the corners to hang it up in their homes, barns, and outhouses (to provide both reading material and toilet paper). In 1919, the Almanac's publishers began pre-drilling holes in the corners to make it even easier for readers to keep all of that invaluable information (and paper) handy.

Spring Is Here – Sign Up Today!

The Farmers' Almanac is a gardener's best friend. Get 365 days of access to our online weather and gardening calendars + a copy of the 2017 Almanac
for only $13.99 $11.99!

Subscribe Today »